Tim is right, fix should be: | public void shutdownNow() | { | synchronized (tasks) | { | tasks.clear(); | shutdown = true; | } | } | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4184991#4184991 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4184991